I have the following class public class LanguagingBindingSource : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; public string Dummy { get { return String.Empty; } set { PropertyChanged(this, new PropertyChangedEventArgs("Dummy")); } } } that is bound to elements in XA...
I have a WPF form with a combobox and a textbox (both are databound to an Object's property). Changing the combobox or textbox input updates the Object's property and the databinding kicks in and updates the UI. The problem is, I implemented a way to cancel the change, which works, but screws up the UI updating. If I make the change from...
hI, I am working in wpf - mvvm model. I have a textbox which holds- "marketName". In xaml I am binding the property - "newmarketname"(which is defined in my viewmodel) to this textbox. Once if user enter a new market name in that text box, the "set" method of the "newmarketname" get called. In set method of the "newmarketname", I cal...
Hello, I have a thought provoking question, in relation to the use Entity Framework (EF) to persist data. My (intended) application is not a typical LOB scenario where the standard CRUD operations are done on individual records. Instead, what I would like to use the data stored within my entities, create some Matrices by combining the ...
I am trying to improve the performance of a DataGridView hooked up to a collection of custom data objects. The collection doesn't actually change size once initialized (i.e., no data objects are added or removed once the list is loaded on start-up), but the properties of the data objects dynamically change, and the grid is basically supp...
Hi. I may be confused about the purpose behind INotifyPropertyChanged and Silverlight... I have XAML that I created in the designer: <UserControl.Resources> <CollectionViewSource x:Key="theViewSource" d:DesignSource="{d:DesignInstance my:transferObject, CreateList=True}" /> </UserControl.Resources> as well as this <...
I have a simple application which uses a BindingList<(Person)>, people, to store information about employees (Windows Forms). Person has several properties such as Name, DateOfBirth, etc and implements INotifyPropertyChanged. The BindingList<(Person)>, people, is bound to a binding source. A DataGridView control is bound to this source,...
Let's assume I'm implementing a Winforms UI where all commands adhere to the following pattern: interface ICommand { bool CanExecute { get; } void Execute(); } Buttons or menu items that trigger such a command should have the following set-up: property Enabled is bound to the command's CanExecute event Click is linked to the...
Let's say I have an app and a web site using the same database. I wan't to create a Data layer and some model objects. In many cases the model objects uses alot of info from some of the database tables. My idea was to wrap the LINQ to SQL entity class for the table inside the view so I won't have treate the properties again. I was wonde...
Hi, In MVVM pattern, how to notify all properties of the view model has changed? I don' t want to call all notifypropertychanged event of all properties. I have an entity class and in view model I wrote all of the public fields of the entity as public properties. I want to rebind new entity and just write a single line of code to noti...
Project Overview Basically I was creating WPF application using MVVM pattern. However I had a thread which was updating my Data Model, so ViewModel, had to be notified about these changed and I needed a Notification mechanism in my Model. That would make my app make propagating notifications from one class to another, so I decided to Ha...
I've created a wrapper collection for ObservableCollection that subscribes to each items PropertyChanged event and rethrows it as its own event ItemPropertyChanged. I did this using a similar method to what I described here. Is there a better way? Am I missing another .NET collection that already has this type of behavior? ...
I have a custom object that I am trying to bind to a control. On that custom object I have implemented the INotifyPropertyChanged interface. I have successfully bound to my object and a property on that object. What I can't figure out is how to go from there. I've been working on this for 2 days now and I still cannot get it working. M...
let's say we are using IValueConverter to format a GridView cell background color depending on its value. now let's say that value is calculated on a separate thread, after adding the item to the collection. var args = GetInput(); if (ValidateArgs(args)) { if (args.Rate.HasValue) Thre...
I'm trying to bind some WPF controls to a sealed class provided to me. Because it is sealed, I cannot inherit from it to create a class that implements INotifyPropertyChanged. So I'm not sure how I should go about doing this. Should I create a wrapper that implements INotifyPropertyChanged? Anyone have any tips on what to do? ...
I have a parent object called Page that has a List of objects called Control:public class Page{ List<CustomControl> controls {get;set;} The CustomControl class has the following defintion: public class CustomControl { string Name {get;set;} string Value {get;set;} } Say for instance the Page class has two CustomControls A and B. Is i...
I have a TreeView where each item has a checkbox. I want a TextBlock to be updated whenever an item is checked or unchecked in the TreeView. The TextBlock's Text should be bound to the CheckedVersions property on my DataContext so that when I read the CheckedVersions property, it gives me a string representing all the checked items in ...
I am trying to understand how to update the UI if I have a read-only property that is dependent on another property, so that changes to one property update both UI elements (in this case a textbox and a read-only textbox. For example: public class raz : INotifyPropertyChanged { int _foo; public int foo { get { retu...
i am implementing PropertyChangedEventHandler PropertyChanged and it's always null. property string is right donno where is the problem here is the code i am using public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged(string propertyName) { PropertyChangedEventHan...
First, I apologize for my low level English writing. I use Entity Framework and data-binding in WPF MVVM project. I would like to know what is the best way to do data binding to added calculated property of EntityObject which is generated with Entity Framework. For example: partial class Person { partial string Name....